Continuing the discussion on previous post https://netoverme.wordpress.com/2010/11/03/exchange-server-2007-sp1-on-isa-server-2006-architecture .
Other than publishing the firewall policy of SMTP 25, I need to configure Outlook Web Access 2007 (OWA) to be created using the Mail Publishing Wizard in ISA Server. This rule is staight forward. Before that, I must resolve the OWA url of internal network so that the users are easily to remember to browse or open their mail using OWA. I prefer to use https://mail.netoverme.info/ . This domain https://mail.netoverme.info resolve my Client Access Server that runs OWA where I need to configure my internal DNS server.
Then, I need to create OWA certificate to be issued on the IIS of OWA 2007 which is at Client Access Server Role and make sure there is no security warning pop up when opening the OWA url (https://mail.netoverme.info/owa)
Example of Publish certificate request by power shell command:
Certificate Resquest Saving into text (txt file)
Note: You need to install Certificate Service in order to issue the certificate. Usually using browser http://yourCAserver/certsrv . Afer issuing certificate, where at the end you save, “certnew.cer”, you need to issue on your OWA website on IIS.
After that, I export the certificate as including the private key
you need to set the private key as you prefer and proceed next until finish wizard. This certificate is important where ISA Server would ask this later.
When Publishing Mail rule policy, it is really straight forward. You need to have the certificate above to export in Personal folder of certificate and as I say earlier, you need the private key to include during you creating this on web listener as you go along with the creation of OWA publishing rule.
After that, you test the firewall policy using The Test Rule button https://netoverme.wordpress.com/2010/02/18/isa-server-create-new-rule/
Finally, try to telnet port smtp 25 from public IP address.